Imoduli ye-Acousto-optic: Isicelo kumakhabethe e-athomu abandayo
Njengengxenye eyinhloko yesixhumanisi se-laser ye-all-fiber kukhabhinethi ye-athomu ebandayo, ii-optical fibre acousto-optic modulatorizohlinzeka nge-laser eqinile ye-frequency-stabilized yekhabhinethi ye-athomu ebandayo. Ama-athomu azomunca ama-photon nge-resonant frequency ye-v1. Njengoba umfutho wama-photon nama-athomu uphambene, ijubane lama-athomu lizokwehla ngemva kokumunca ama-photon, ngaleyo ndlela kufezwe injongo yokupholisa ama-athomu. Ama-athomu apholile nge-laser, anezinzuzo zawo ezifana nesikhathi eside sokuhlola, ukuqedwa kokushintshwa kwemvamisa ye-Doppler nokushintshwa kwemvamisa okubangelwa ukungqubuzana, nokuhlangana okubuthakathaka kwenkambu yokukhanya okutholwayo, athuthukisa ngokuphawulekayo amandla okulinganisa anembile e-athomu spectra futhi angasetshenziswa kabanzi kumawashi abandayo e-athomu, ama-interferometer abandayo e-athomu, kanye nokuzulazula kwenkambu ye-athomu.
Ingaphakathi le-optical fiber AOM acousto-optic modulator ikakhulukazi iqukethe ikristalu ye-acousto-optic kanye ne-optical fibre collimator, njll. Isiginali eshintshiwe isebenza ku-transducer ye-piezoelectric ngendlela yesignali kagesi (i-amplitude modulation, ukuguqulwa kwesigaba noma ukuguqulwa kwamafrikhwensi). Ngokushintsha izici zokufaka ezifana nemvamisa kanye nobukhulu besiginali eshintshiwe yokufaka, ukushintshwa kwemvamisa kanye ne-amplitude ye-laser yokufaka kufinyelelwa. I-transducer ye-piezoelectric iguqula amasignali kagesi abe amasignali e-ultrasonic ahluka ngephethini efanayo ngenxa yomphumela we-piezoelectric futhi iwasakaze ku-acousto-optic medium. Ngemuva kokuthi inkomba ye-refractive ye-acousto-optic medium ishintsha ngezikhathi ezithile, i-refractive index grating iyakhiwa. Lapho i-laser idlula ku-fiber collimator futhi ingena ku-acousto-optic medium, kwenzeka i-diffraction. Ukuvama kokukhanya okuhlukanisiwe kudlula imvamisa ye-ultrasonic kufrikhwensi ye-laser yokufaka yasekuqaleni. Lungisa indawo ye-optical fibre collimator ukuze wenze i-optical fibre acoust-optic modulator isebenze esimweni esihle kakhulu. Ngalesi sikhathi, i-engeli yesigameko ye-beam yokukhanya kwesigameko kufanele yenelise isimo se-Bragg diffraction, futhi imodi ye-diffraction kufanele ibe yi-Bragg diffraction. Ngalesi sikhathi, cishe wonke amandla okukhanya kwesigameko adluliselwa ekukhanyeni kwe-oda lokuqala.
Imodeli yokuqala ye-AOM ye-acouto-optic isetshenziswa ekugcineni kwe-amplifier optical yesistimu, ilungisa ukukhanya kokufakwayo okuqhubekayo kusukela ekugcineni okungaphambili ngama-optical pulses. Ama-optical pulses ashintshiwe abe esefaka imojula yesistimu yokukhulisa amandla okukhulisa amandla. OwesibiliImoduli ye-acouto-optic ye-AOMisetshenziswa ngemuva kokuphela kwe-optical amplifier, futhi umsebenzi wayo ukuhlukanisa umsindo oyisisekelo wesignali ye-optical pulse ekhuliswe uhlelo. Amaphethelo angaphambili nangemuva okukhishwa kwe-pulses ukukhanya ngemoduli yokuqala ye-AOM acouto-optic asatshalaliswa ngokulinganayo. Ngemva kokufaka i-amplifier optical, ngenxa yokuzuza kwe-amplifier yonqenqema oluhamba phambili lwe-pulse ephakeme kunaleyo ye-pulse trailing edge, i-amplified light pulses izobonisa isenzakalo sokuhlanekezela kwe-waveform lapho amandla agxilwe khona onqenqemeni oluhamba phambili, njengoba kuboniswe kuMfanekiso 3. Ukuze unike amandla isistimu ukuthola i-optical pulses engemuva kanye ne-AOM yangaphambili yokusatshalaliswa kwe-OM imoduli ye-acouto-optic idinga ukusebenzisa ukuguquguquka kwe-analog. Iyunithi yokulawula isistimu ilungisa unqenqema olukhuphukayo lwemodeli yokuqala ye-AOM ye-acouto-optic ukuze ikhulise unqenqema olukhuphukayo lwe-optical pulse yemojuli ye-acoust-optic futhi inxephezele ngokuzuza okungefani kwe-amplifier optical emaphethelweni angaphambili nangemuva okushaya kwenhliziyo.
I-amplifier optical yesistimu ayigcini nje ngokukhulisa amasignali awusizo we-optical pulse, kodwa futhi ikhulisa umsindo oyisisekelo wokulandelana kwe-pulse. Ukuze kuzuzwe isilinganiso esiphezulu sesignali-kuya-kumsindo wesistimu, isici sesilinganiso sokushabalala esiphezulu se-fiber opticalI-AOM moduleisetshenziselwa ukucindezela umsindo oyisisekelo ekupheleni kwe-amplifier, iqinisekisa ukuthi ama-pulses esignali yesistimu angadlula ngempumelelo kuze kube sezingeni elikhulu kakhulu ngenkathi ivimbela umsindo oyisisekelo ukuthi ungangeni ku-shutter ye-acousto-optic yesizinda sesikhathi (isango lokushaya kwesizinda sesikhathi). Indlela yokushintshashintsha yedijithali iyamukelwa, futhi isignali yeleveli ye-TTL isetshenziselwa ukulawula ukuvula nokuvala kwemojula ye-acoust-optic ukuze kuqinisekiswe ukuthi umkhawulo okhuphukayo wokushaya kwesizinda sesikhathi semojuli ye-acoust-optic yisikhathi esiklanyelwe sokukhuphuka somkhiqizo (okungukuthi, isikhathi esincane sokukhuphuka esingatholwa umkhiqizo), kanye nobubanzi be-pulse buncike kububanzi bezinga lokushaya kwe-TTL lohlelo.
Isikhathi sokuthumela: Jul-01-2025